Kinetic Model of Matter

Which of the following is not a property of a solid?

• It expands a little when heated compared to a liquid
• It takes any shape of a container
• It is not easy to be compressed
• It usually has a higher density than a gas

Which of the following statements explains the Brownian motion of smoke particles?

• It is the collision between the smoke particles.
• It is the collision between the smoke particles and the wall of a container.
• It is the collision between the smoke particles and air particles.
• It is the collision between the smoke particles and the light.

Kuku just made himself a cup of hot tea.

Which row describes the water particles in the air above the cup compared with the water particles in the cup?

• A

• B

• C

• D

What could be the change when heat is supplied to a gas?

• The particles in the matter expand tremendously.

• The particles move randomly at all directions.

• The average kinetic energy of the particles increases.

• The particles contract and occupy lesser space.

Solids have high densities relative to liquids because

1 the particles in solids are far apart.

2 the particles in solids have large masses.

3 the particles in solids do not move about.

• 1 only

• 2 only

• 2 and 3 only

• None of the above

Tags

NGSS.MS-PS3-1

Which diagram shows the movement of a molecule in a gas?

• A

• B

• C

• D

When heated, the volume of gas increases much more than the volume of a solid or a liquid because the

• particles of solids and liquids cannot move.

• particles of a gas are bigger.

• molecules of gas are lighter.

• attractive force between particles of gas is weaker.

Check all properties of the solid state of matter.

• Fixed shape and volume

• No fixed shape and volume

• Low density

• High density

• Incompressible

Solids have high densities because

• particles are always in continuous and random motion.

• particles are bigger than those in liquid and gas.

• particles are closely packed together.

• particles are smaller than those in liquid and gas.

The particles in a gas:

• vibrate about a fixed position

• move around each other

• move quickly in all random directions